Lock.



D. STRAND.

LOCK.

APPLICATION FILED JULY 30. 1915.

Patented June 27,1916.

DAVID STRAND, 0F CHICAGO,'ILLINOIS.

LooK.

Specification of Letters Patent.

Application filed July 30, 1915. Serial No. 42,676.

To all whom it may concern:

Be it known, that I, DAVID STRAND, a citizen of the United States, residing at Chicago, in the county of Cook and'State of Illinois, have invented certain new and use ful Improvements in Locks, of which the following is a specification.

My invention pertains to looks in gen eral, both those intended to be used merely temporarily, and those designed for permanent use in one position.

More specifically, my improved lock may be employed in position without any fixed fastening, or it may be so mounted with relation to the elements with which it cooperates that it becomes a fixed part of the structure.

Although susceptible of employment in various ways, my improved and novel appliance is particularly adapted for use as a burglar look, as for instance, in association with a door or window.

The leading object of the invention is the provision of a locking appliance of this general character which shall be simple in structure, composed of few parts, economical to manufacture, unlikely to become damaged, strong and effective in action, easily mounted and removed, quickly operated, and capable of adjustment so thatthe locked members will be firmly held together.

In the fulfilment of these aims and purposes I have devised a lock of this character composed of but two parts which cannot become accidentally separated or detached from one another.

In order that those skilled in this art may have a full and complete understanding of this improved appliance, and its method of operation, I have illustrated a preferred embodiment of the same in the accompanying drawing forming a part of this specification, and to which reference should be had in connection with the following detailed description.

In the drawing: Figure 1 is an elevation of a portion of a wall illustrating the lock associated with a door; Fig. 2 is an enlarged horizontal section on line 2-2 of Fig. 1, the parts being viewed in the direction indicated by the arrows, and in this figure the retraction of the locking-nut permitting the opening of the door is indicated in dotted lines; Fig. 3 is a vertical section on line 3-3 of Fig. 2, the parts being viewed in the directionindicated by the a'rrows, or,

in other words, this figure illustrates the attachment of the locking-device to the doorcasing; Fig. 4 is a perspective view of the threaded bar of the locking-appliance, and Fig. 5 is a fragmentary sectionshowing the cooperation of the nutwith such bar.

This improved style of locking device comprises a flat bar 10 bent at one end to'pro v1de a lug or ear 11 adapted to fit in the cavity 12 of, the. door-casing which receives the latch 13 of the door 14, the body-portion of the bar lying against the face of the usual casing-plate 15, as is clearly illustrated in Figs. 2 and 3. In this way, a firm an'd'posit1ve engagement is secured between'the bar and the door-casing.

The two opposite edges of the bar are threaded at 16 and 17 for the reception of a nut 18 which is adapted by its turning to cooperate with the threads and travelialong the bar either into the door-locking position or into a retracted position permitting opening of the door. The bar is bent or curved at 19, sufiiciently sothat as the nut is backed away and travels on thecurved portion it will be out of cooperative relation with the.

door, as illustrated in .dotted lines in Fig. 2, and, in order to prevent the nut from being backed off entirely from the bar the end of they latter is upset or enlarged at 20, preventing such separation of the elements. To secure aquick retraction of the nut, especially on thec'urved portion of the bar, the threads 17 are omitted on the lower edge, as shown in Fig. 4:, so that by backing the nut sufficiently it maybe lifted out of engagement with the .top threads 19 and quickly and bodily shifted to its rearmost position. To advance it into door-locking relation however, it is carried forwardly in lifted position until it engages the threads both on the top and bottom edges of the bar, and is then screwed home so as to bear against the faces of the casing and door, as shown in Figs. 1 and 2, and when in this position the door is securely locked against opening. Owing to the presence of the threads on one edge only of the bar, the nut may be advanced without its threads engaging those of the bar. Then when it approaches that portion of thebar equipped with the duplex threads, itis. easily associated with the one group of threads which determines that as soon as it reaches the ratentea'atmeav, 1916. i

beginning of the second set of threads it will be in register therewith and will'screw onto them without difliculty.

When it is desired to retain the lock in position, even though the door be opened, a screw, (not shown), by means of an aperture 21 in the bar, may be employed for fastening the bar to the door-casing in the position illustrated. If the bar is not held in this or some other manner, it will, of course, be free to fall out of position as soon as the door is opened.

One particular advantage of this type of construction resides in the fact that the lock comprises two members only, operatively associated with one another and prevented from disassociaton or separation by means I of the upsetting of the bar-end, that is, the

providing of it with shoulders or smilar means.

A further feature of advantage in a structure of this character is the fact that it can be used with doors of different thicknesses and yet securely bear against any one owing to the adjustably threaded engagement of the nut with the bar.

Furthermore, by omitting the threads on the forwardly-projecting curved portion of the bar, the nut may be more quickly brought into operative or inoperative position, hence rendering the locking-device operable with facility and despatch either in advancing the nut intoVdoor-engaging position or retracting it.

It should be additionally observed that there is nothing about this appliance which injures the door-casing or door, that is, it has no prongs to be forced into the wood, nor does it have any other parts tending to-mar or damage the appearance of the door or its associated casing.

Other features of advantage will be apparent to those skilled in the art and need not here be indicated in detail, but'it should be borne in mind that various minor me- 7 adapted to lock together two members movable relatively to one another, comprising in combination a flat bar adapted to be secured to one of said members and threaded on its opposite edges, and a threaded nut adjustably engaging the threads of said bar and adapted to bear against the other member to prevent such relative movement, said bar being bent to permit a retraction of the nut thereon to escape said latter member during its movement relative to its companion member, said bar being reduced in width to permit rapid movement of the nut on said bent portion, substantially as described. I

2. In a device of the character described adapted to lock together two members movable relatively to one another, comprising in combination a flat bar adapted to be secured to one of said members and threaded on its opposite edges, and a threaded nut adapted to adjustably engage the threads of said bar and bear against the other member to prevent such relative movement, said bar being bent to permit a sufficient retraction of the nut thereon toescape said latter member during its movement relative to the companion member, the threads being omitted from an edge of said bar on its bent portion to permit rapid movement of the nut thereon, substantially as described.

DAVID STRAND.

@cpiee at this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

- Washington, D. G." 

